Ernest cazin



@No Model.)` 2 Sheets-s116631.

EL GAZIN.

LOCK.

No. 523336. Patented' Ju'l 31, 1894.v

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E; OAZIN. Loox (No Model.)

No.- 523,736. Patented Julyl, 1894.

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W/TNESSES:

'me Nonms PETERS co. PHOTO-Limo.. WASHINGTON. D. c.

NITE STATES PATENT l- LOC K\.

SPECIFICATION forming part of Letters Patent No. 523,736, dated July 31, 1894. Applicationled October 11, 1893. Serial No.- 487,802. (No model.) V

To. @ZZ whom it may concern: Y

Be it known that I, ERNEST OAZIN, a citizen of France, and a. resident of West Hoboken, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Door-Locks, of which the following is a specification.

The object of my invention is to provide'a new and improved door lock whichcan readily be adjusted to lock the door in the usual manner and can also be so adj usted as to lock the door in such a manner that it can be opened but a short distance, so as to permit the person at the inside of the door to ascertain who is at the outside, before unlocking.

In the accompanying drawings, Figure 1 is an elevation of a door provided with my improved lock, the door being closed. Fig. 2 is `a perspective view of the same, the door being opened and the lock so adjusted that the door can only be opened a short distance. Fig. 3 is an enlarged horizontal View through my improved lock. Fig. et is a vertical longitudinal sectional view, through the lock,and

Fig. 5 is an enlarged detail sectional view, on the line 5, 5, of Fig. 1, partsbeing broken out.

Similar letters of reference indicate corre- Y spending parts.

The lock-casingA is provided with the keyhole A and the pin A2 on which thekey can turn. The lock is provided with a sliding bolt B formed of two sections B which are pressed from each other by a spring B2 attached to one of the sections. Each section B is provided on its outer edge with a beveled` lug b that can travel up along the edge of beveled lugs b secured to the lock-casing adjacent to a slot C in one end of the lockingcasing, through which slot the bolt passes. The sections B are guided at their rear ends by guides C' in the lock-casing. The sections B B are provided at their adjacentedges near the outer ends with recesses el, for a purpose that will be set forth hereinafter.

The keeper D for receiving the bolt is provided with an aperture D', through which a chain E passes, the lower end of the chain being fastened to a helical spring F secured in the bottom of a recess F' in the door-frame.

F2 is a check-disk on the end of the chain.

A circular button H is provided with a peripheral groove H', and to said button the upper end of the chain E is fastened, said button resting against the back of the keeper and being'of such size that it cannot be drawn 55 through the aperture D. A latch-plate J is mounted to slide in the keeper and is provided with a recess J in one edge for receiving partv of the button H, and said latch-plate is 'pro-- vided Ywith a handle projection lK passing through a slot K in the keeper, so that by shifting said handle-projection the latchplate is also shifted. M is the usual beveled spring-bolt of the lock. K

When the bolt is drawn entirely into the lock-casing the' door O, to which the lock is attached, can be opened' and closed in the usual manner. When the dooris to be locked in such a manner that it can be opened only a short distance to enable the'person at the inside to observe the person at the outside, the latch-plate J remains withdrawn, as shown in'Figs. 2 and 4, and the bolt is thrown by turning the key. As the sections of the bolt project from the casing they are separated by the spring B2 and their enlarged ends embrace the button H. As the holt-sections move outward their beveled lugs b engage the fixed bevel lugs b o f the lock-casing, whereby the jaws are pressed toward each other and firmly hold the button H. If now the door is opened, that is, moved in the direction of the arrow oc, Fig. A3, thek chain is pulled outward and the door can only be opened until the disk F3 strikes against the back of the keeper or that part of the door-casing forming the wall of the recess in which the chain is contained. If the person on the outside-is to be admitted, the door is closed, the bolt Withdrawn so as to release the button H, and the door is then opened in the usual manner. In case the door is to be locked in such a manner that it cannot be opened at all, the bolt is thrown outward in the usual manner,so as to engage the button H and the latch-plateJ is shifted so as to .engage the button H and to rest over the projecting ends of the boltsections as shown in Figs. l and 3. When the door is closed and a person applies for admission, and the person at the inside wishes to see who the person at the outside is before admitting, all that is necessaryis to push back the latch J, when the door can bev openedA as far as the chain will permit. My improved IOO lock can thus be readily adjusted as an lordinary door-lock or as a so-called chain-lock simply by shifting the latch-plate J.

This lock can be locked and unlocked from the outside as Well as from the inside, the key being used in the same manner in both cases and the parts operating in the same manner in both cases.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with a lock casing, of a sliding bolt composed of two pieces mounted to move toward and from each other-,a chain provided on one end with a button to be engaged by the twopiece bolt, and a receptacle for said chain, substantially as set forth.

2. The combination, with a lock-casing, of a sliding bolt composed of two sections mounted to move toward and from each other, aspring between the sections, beveled lugs on the sections, beveled lugs on the casing, a chain, a receptacle for the chain, and a grooved button on the end of the chain, which grooved button can be grasped by the two-piece bolt, substantially as set forth. V

3. The combination, with alock and keeper, of a chain passed through an aperture in the keeper, a grooved button on the end of the chain, a bolt in the lock constructed to engage said button, and a sliding latch-plate in the keeper, substantially as set forth.

4. The combination, with a lock and keeper, of a chain passed through an aperture in the keeper, a button on the outer end of the chain, a lock-bolt constructed to graspsaid button, a sliding latch-plate in the keeper, which latchplate has a notch for receiving part of the button, and a handle projecting from said latch-plate through a slot in the keeper `substantially as Setforth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

ERNEST CAZIN.

Witnesses:

OSCAR F. GUNZ, t CHARLES SoHRoEDER. 

